mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
Added decoding of El Torito boot catalog.
This commit is contained in:
@@ -93,6 +93,7 @@ namespace DiscImageChef.Filesystems.ISO9660
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PrimaryVolumeDescriptor? jolietvd = null;
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BootRecord? bvd = null;
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HighSierraPrimaryVolumeDescriptor? hsvd = null;
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ElToritoBootRecord? torito = null;
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// ISO9660 is designed for 2048 bytes/sector devices
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if(imagePlugin.GetSectorSize() < 2048)
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@@ -143,7 +144,7 @@ namespace DiscImageChef.Filesystems.ISO9660
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switch(VDType)
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{
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case 0: // TODO
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case 0:
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{
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bvd = new BootRecord();
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IntPtr ptr = Marshal.AllocHGlobal(2048);
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@@ -154,7 +155,14 @@ namespace DiscImageChef.Filesystems.ISO9660
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BootSpec = "Unknown";
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if(CurrentEncoding.GetString(bvd.Value.system_id).Substring(0, 23) == "EL TORITO SPECIFICATION")
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{
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BootSpec = "El Torito";
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torito = new ElToritoBootRecord();
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ptr = Marshal.AllocHGlobal(2048);
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Marshal.Copy(vd_sector, hs_off, ptr, 2048 - hs_off);
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torito = (ElToritoBootRecord)Marshal.PtrToStructure(ptr, typeof(ElToritoBootRecord));
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Marshal.FreeHGlobal(ptr);
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}
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break;
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}
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@@ -278,9 +286,9 @@ namespace DiscImageChef.Filesystems.ISO9660
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ISOMetadata.AppendLine("This is a Sega Dreamcast disc.");
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ISOMetadata.AppendLine(Decoders.Sega.Dreamcast.Prettify(Dreamcast));
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}
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ISOMetadata.AppendLine("--------------------------------");
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ISOMetadata.AppendLine("------------------------------");
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ISOMetadata.AppendLine("VOLUME DESCRIPTOR INFORMATION:");
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ISOMetadata.AppendLine("--------------------------------");
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ISOMetadata.AppendLine("------------------------------");
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ISOMetadata.AppendFormat("System identifier: {0}", decodedVD.SystemIdentifier).AppendLine();
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ISOMetadata.AppendFormat("Volume identifier: {0}", decodedVD.VolumeIdentifier).AppendLine();
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ISOMetadata.AppendFormat("Volume set identifier: {0}", decodedVD.VolumeSetIdentifier).AppendLine();
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@@ -304,9 +312,9 @@ namespace DiscImageChef.Filesystems.ISO9660
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if(jolietvd != null)
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{
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ISOMetadata.AppendLine("---------------------------------------");
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ISOMetadata.AppendLine("-------------------------------------");
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ISOMetadata.AppendLine("JOLIET VOLUME DESCRIPTOR INFORMATION:");
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ISOMetadata.AppendLine("---------------------------------------");
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ISOMetadata.AppendLine("-------------------------------------");
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ISOMetadata.AppendFormat("System identifier: {0}", decodedJolietVD.SystemIdentifier).AppendLine();
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ISOMetadata.AppendFormat("Volume identifier: {0}", decodedJolietVD.VolumeIdentifier).AppendLine();
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ISOMetadata.AppendFormat("Volume set identifier: {0}", decodedJolietVD.VolumeSetIdentifier).AppendLine();
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@@ -328,6 +336,166 @@ namespace DiscImageChef.Filesystems.ISO9660
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ISOMetadata.AppendFormat("Volume has always been effective.").AppendLine();
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}
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if(torito != null)
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{
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vd_sector = imagePlugin.ReadSector(torito.Value.catalog_sector + partition.Start);
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Checksums.SHA1Context sha1Ctx = new Checksums.SHA1Context();
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sha1Ctx.Init();
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byte[] boot_image;
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int torito_off = 0;
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if(vd_sector[torito_off] != 1)
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goto exit_torito;
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ElToritoValidationEntry valentry = new ElToritoValidationEntry();
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IntPtr ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
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Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
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valentry = (ElToritoValidationEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoValidationEntry));
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Marshal.FreeHGlobal(ptr);
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if(valentry.signature != ElToritoMagic)
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goto exit_torito;
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torito_off += ElToritoEntrySize;
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ElToritoInitialEntry initial_entry = new ElToritoInitialEntry();
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ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
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Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
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initial_entry = (ElToritoInitialEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoInitialEntry));
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Marshal.FreeHGlobal(ptr);
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initial_entry.boot_type = (ElToritoEmulation)((byte)initial_entry.boot_type & 0xF);
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boot_image = imagePlugin.ReadSectors(initial_entry.load_rba + partition.Start, initial_entry.sector_count);
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ISOMetadata.AppendLine("----------------------");
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ISOMetadata.AppendLine("EL TORITO INFORMATION:");
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ISOMetadata.AppendLine("----------------------");
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ISOMetadata.AppendLine("Initial entry:");
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ISOMetadata.AppendFormat("\tDeveloper ID: {0}", CurrentEncoding.GetString(valentry.developer_id)).AppendLine();
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if(initial_entry.bootable == ElToritoIndicator.Bootable)
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{
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ISOMetadata.AppendFormat("\tBootable on {0}", valentry.platform_id).AppendLine();
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ISOMetadata.AppendFormat("\tBootable image starts at sector {0} and runs for {1} sectors", initial_entry.load_rba, initial_entry.sector_count).AppendLine();
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if(valentry.platform_id == ElToritoPlatform.x86)
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ISOMetadata.AppendFormat("\tBootable image will be loaded at segment {0:X4}h", initial_entry.load_seg == 0 ? 0x7C0 : initial_entry.load_seg).AppendLine();
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else
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ISOMetadata.AppendFormat("\tBootable image will be loaded at 0x{0:X8}", (uint)initial_entry.load_seg * 10).AppendLine();
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switch(initial_entry.boot_type)
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{
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case ElToritoEmulation.None:
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ISOMetadata.AppendLine("\tImage uses no emulation");
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break;
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case ElToritoEmulation.Md2hd:
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ISOMetadata.AppendLine("\tImage emulates a 5.25\" high-density (MD2HD, 1.2Mb) floppy");
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break;
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case ElToritoEmulation.Mf2hd:
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ISOMetadata.AppendLine("\tImage emulates a 3.5\" high-density (MF2HD, 1.44Mb) floppy");
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break;
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case ElToritoEmulation.Mf2ed:
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ISOMetadata.AppendLine("\tImage emulates a 3.5\" extra-density (MF2ED, 2.88Mb) floppy");
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break;
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default:
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ISOMetadata.AppendFormat("\tImage uses unknown emulation type {0}", (byte)initial_entry.boot_type).AppendLine();
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break;
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}
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ISOMetadata.AppendFormat("\tSystem type: 0x{0:X2}", initial_entry.system_type).AppendLine();
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ISOMetadata.AppendFormat("\tBootable image's SHA1: {0}", sha1Ctx.Data(boot_image, out byte[] hash)).AppendLine();
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}
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else
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ISOMetadata.AppendLine("\tNot bootable");
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torito_off += ElToritoEntrySize;
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int section_counter = 2;
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while(torito_off < vd_sector.Length && (vd_sector[torito_off] == (byte)ElToritoIndicator.Header || vd_sector[torito_off] == (byte)ElToritoIndicator.LastHeader))
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{
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ElToritoSectionHeaderEntry section_header = new ElToritoSectionHeaderEntry();
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ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
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Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
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section_header = (ElToritoSectionHeaderEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionHeaderEntry));
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Marshal.FreeHGlobal(ptr);
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torito_off += ElToritoEntrySize;
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ISOMetadata.AppendFormat("Boot section {0}:", section_counter);
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ISOMetadata.AppendFormat("\tSection ID: {0}", CurrentEncoding.GetString(section_header.identifier)).AppendLine();
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for(int entry_counter = 1; entry_counter <= section_header.entries && torito_off < vd_sector.Length; entry_counter++)
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{
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ElToritoSectionEntry section_entry = new ElToritoSectionEntry();
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ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
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Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
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section_entry = (ElToritoSectionEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionEntry));
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Marshal.FreeHGlobal(ptr);
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torito_off += ElToritoEntrySize;
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ISOMetadata.AppendFormat("\tEntry {0}:", entry_counter);
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if(section_entry.bootable == ElToritoIndicator.Bootable)
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{
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boot_image = imagePlugin.ReadSectors(section_entry.load_rba + partition.Start, section_entry.sector_count);
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ISOMetadata.AppendFormat("\t\tBootable on {0}", section_header.platform_id).AppendLine();
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ISOMetadata.AppendFormat("\t\tBootable image starts at sector {0} and runs for {1} sectors", section_entry.load_rba, section_entry.sector_count).AppendLine();
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if(valentry.platform_id == ElToritoPlatform.x86)
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ISOMetadata.AppendFormat("\t\tBootable image will be loaded at segment {0:X4}h", section_entry.load_seg == 0 ? 0x7C0 : section_entry.load_seg).AppendLine();
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else
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ISOMetadata.AppendFormat("\t\tBootable image will be loaded at 0x{0:X8}", (uint)section_entry.load_seg * 10).AppendLine();
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switch((ElToritoEmulation)((byte)section_entry.boot_type & 0xF))
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{
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case ElToritoEmulation.None:
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ISOMetadata.AppendLine("\t\tImage uses no emulation");
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break;
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case ElToritoEmulation.Md2hd:
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ISOMetadata.AppendLine("\t\tImage emulates a 5.25\" high-density (MD2HD, 1.2Mb) floppy");
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break;
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case ElToritoEmulation.Mf2hd:
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ISOMetadata.AppendLine("\t\tImage emulates a 3.5\" high-density (MF2HD, 1.44Mb) floppy");
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break;
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case ElToritoEmulation.Mf2ed:
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ISOMetadata.AppendLine("\t\tImage emulates a 3.5\" extra-density (MF2ED, 2.88Mb) floppy");
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break;
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default:
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ISOMetadata.AppendFormat("\t\tImage uses unknown emulation type {0}", (byte)initial_entry.boot_type).AppendLine();
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break;
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}
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ISOMetadata.AppendFormat("\t\tSelection criteria type: {0}", section_entry.selection_criteria_type).AppendLine();
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ISOMetadata.AppendFormat("\t\tSystem type: 0x{0:X2}", section_entry.system_type).AppendLine();
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ISOMetadata.AppendFormat("\t\tBootable image's SHA1: {0}", sha1Ctx.Data(boot_image, out byte[] hash)).AppendLine();
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}
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else
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ISOMetadata.AppendLine("\t\tNot bootable");
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ElToritoFlags flags = (ElToritoFlags)((byte)section_entry.boot_type & 0xF0);
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if(flags.HasFlag(ElToritoFlags.ATAPI))
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ISOMetadata.AppendLine("\t\tImage contains ATAPI drivers");
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if(flags.HasFlag(ElToritoFlags.SCSI))
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ISOMetadata.AppendLine("\t\tImage contains SCSI drivers");
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if(flags.HasFlag(ElToritoFlags.Continued))
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{
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while(true && torito_off < vd_sector.Length)
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{
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ElToritoSectionEntryExtension section_extension = new ElToritoSectionEntryExtension();
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ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
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Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
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section_extension = (ElToritoSectionEntryExtension)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionEntryExtension));
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Marshal.FreeHGlobal(ptr);
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torito_off += ElToritoEntrySize;
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if(!section_extension.extension_flags.HasFlag(ElToritoFlags.Continued))
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break;
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}
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}
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}
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if(section_header.header_id == ElToritoIndicator.LastHeader)
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break;
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}
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}
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exit_torito:
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xmlFSType.Type = HighSierra ? "High Sierra Format" : "ISO9660";
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if(jolietvd != null)
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